Even though 5% of users’ total time is spent past the 2,000-pixel mark, they tend to scan information that far from the top fairly superficially: some pages are very long (often 4,000+ pixels in my sample), and thus this 5% of user attention is spread very thinly. In our study, user viewing time was distributed as follows:

Above the fold: 80.3%

Below the fold: 19.7%

We used an eye tracker with a resolution of 1,024 × 768 pixels. These days, many users have somewhat bigger screens, and we’ve conducted many (non-ET) usability studies with larger resolutions. Although using a bigger monitor wouldn’t change my conclusions, it would somewhat increase the percentage of user attention spent above the fold simply because more info would be available in the initially viewable space.